Carrier for pneumatic tubes.



PATENTED MAR. 29, 1904.

D. H. JAGKMAN.

CARRIER FOR PNEUMATIC TUBES.

APPLICATION FILED NOV. 9, 1903.

N0 MODEL.

, UNITED STATES V Patented March 29, 1904.

PATE T OFFICE.

DANIEL H. JACK'MAN, OF MAYWOOD, ILLINOIS.

CARRIER FOR PNEUMATIC TUBES.

SPECIFICATION forming part of Letters Patent No. 755,878, dated March29, 1904. Application filed November 9, 1903, Serial No. 180,389. (Nomodel.)

To all whom it may concern:

Be it known that I, DANIEL H. J ACKMAN, a citizen of the United States,residing at Maywood, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Carriers for PneumaticTubes, of which the following is a specification.

My invention relates to carriers for pneumatic tubes such as areemployed for the transmission of cash-sales slips, &c., in pneumaticstore-service systems; and my invention has reference more particularlyto that type of carrier characterized by the provision of a pair oftelescoping cylinders or shells having heads of felt or similar impactmaterial at their opposite ends, respectively, and openings formed inthe walls of their shells, which by a relative rotary movement of thetwo shells are carried into and'out of register to open and close thecarrier. Heretofore, so far as I am aware, carriers of this type havebeen provided with rectangular openings having squarely-cut corners atone or both ends of the opening with a stop or locking pin projectingfrom the surface of one shell just back of one of the longitudinalmargins of its opening and frequently with a notch cut in the oppositemargin or margins of the opening of the other shell to cooperate withthe stop or locking pin and limit the relative rotation of the shellsbetween points at which the opening in the side of the carrier-body isopened and closed. An extended practical experience with carriersconstructed as above described has disclosed the existence therein underthe severe handling and impacts to which these devices are subjected inpractical use of a weakness in point of construction, as evidenced bythe facility with which the material of the shells cracks, splits, andbreaks at the corners of the rectangular openings therein, therebyproducing more or less sharp and ragged points and edges, which areliable to injure the hands of the operatives as well as to catch andtear other objects and materials with which they may come in contact,besides interfering with the perfect closing of the carrier.Furthermore, these notches or recesses weaken the shell and render itmore readily subject to deflection from its true cylindrical form.

the carrler so as It is the primary object of my present invention toeliminate these faults, which to my personal knowledgehas caused incommercial usage the discarding of many hundreds of otherwiseserviceable carriers, and I have discovered that this defectiveconstruction may be satisfactorily remedied by a change in the form andconstruction of the openings in the telescoping shells which make up thebody of to entirely eliminate the square corners of said openings, aswell as to eliminate all slots, notches, and similar edgewise recessionsor projections which interrupt the continuity of the margins of theopenings, and the present invention therefore possesses as its leadingcharacteristic such a formation of the margins of. the openings of thetelescoping shells making up the body of the carrier as preserves theircontinuity throughout and effects a reinforcement at the corners.

My invention will be better understood when considered in connectionwiththe accompanying drawings, wherein Figure 1 is a plan view of a carrierembodying my invention, the same being shown in a closed position. Fig.2 is a cross-sectional view on the line 2 2 of Fig. 1 looking in thedirection of the arrow. Fig. 3 is a View similar to Fig. 1 of thecarrier as it appears when opened nearly to its full extent. Fig. 4 is across-sectional view on the line 4 4 of Fig. 3 looking in the directionof the arrow, and Fig. 5 is a detail fragmentary view illustrating themanner in which the overlapping longitudinal margins of the inner andouter shells pass each other in the final stage of the closing movement.

Referring to the drawings, A designates the outer cylindrical shell, andB the inner cylindrical shell, constituting the body of the carrier, theformer being provided with the usual felt head C and the latter with asimilar head D. The outer shell A has formed therein a generallyrectangular opening bounded by straight continuous longitudinal marginsa and end margins a, while the inner shell B has a corresponding openingbounded by the similar longitudinal margins b and end margins b. Themeeting ends of the longitudinal and end margins of these openings unitein curved oblique marginal portions, (indicated at a in connection withthe shell A and at b in connection with the shell B,) and where theopenings in the shells of the carrier are thus formed with continuousand uninterrupted margins and oblique reinforced corners the cracking,splitting, and breaking of the metal along the margins of the openings,and more particularly at the corners, is entirely obviated, owing to thefact that this construction afiords fillets constituting, in effect,reinforcing-braces against strains and shocks which tend to and actuallydo break and split the metal at these points when the corners are formedsquare or with sharp angles, and especially where the continuity of themargins of the openings is interrupted by notches, slots,

and the like, which produce weakened points in the metal. Anotheradvantage resulting from the rounded or oblique formation of the marginsat the openings at the corners or angles thereof resides in the perfectclosure of the carrier, which may be effected by a relative rotation ofthe shells to bring a solid portion of the inner shell opposite theopening of the outer shell, this advantage resulting by reason of thefact that as the overlapping opposite longitudinal margins approach eachother in the final closing operation the oblique end portions or filletsof these margins cross and intersect each other as they pass with ashearlike action, as clearly shown in Fig. 5, instead of passing whileoccupying positions which are always parallel. When the latterconstruction is employed, if the metal at or near the corner of theopening of the inner shell becomes upset or if the metal at acorresponding point on the outer shell becomes indented or depressed thetwo margins will contact or collide instead of passing each other andoverlapping, thus preventing the perfect closing of the opening; but inmy improved construction herein presented this fault is entirelyeliminated by reason of the fact that the angular reinforcements orfillets at the corners of the openings prevent such accidentaldeflection of the metal at these points, and even if the latter shouldoccur to a slightextent the oblique margins, by reason of the fact thatthey cross or intersect in the final closing, will ride past each otherto the perfectly-closed position.

E designates the usual stop-pin inserted in and projecting from theinner shell B just behind one of the longitudinal margins of itsopening, the rounded periphery of this stoppin engaging and seatingagainst the curved corner of the opposite margin of the outer shell whenthe carrier is closed, all as plainly indicated in Fig. 1.

I claim- 1. A cash-carrier for pneumatic tubes comprising a pair oftelescoped relatively rotatable cylindrical shells each having agenerally rectangular opening formed therein with continuous anduninterrupted margins united by integral oblique marginal portions atthe corners, substantially as described.

2. A cash-carrier for pneumatic tubes comprising a pair of telescopedrelatively rotatable cylindrical shells each having a generallyrectangular opening formed therein characterized by straight continuouslongitudinal and transverse margins united at the corners by obliquemarginal portions constituting reinforcements of the metal of the shellat such points, substantially as described.

3. A cash-carrier for pneumatic tubes comprising a pair of telescopedrelatively rotatable cylindrical shells each having a generallyrectangular opening formed therein characterized by straight continuouslongitudinal and transverse margins united at the corners by concavecurved marginal portions constituting reinforcements of the metal of theshell at such points, and a stop-pin inserted in and projecting from theinner shell behind one of 'said longitudinal margins and cooperatingwith the curved end portions of the longitudinal margins of the outershell, substantially as described.

In testimony that I claim the foregoing as my invention I .have hereuntosubscribed my name in the presence of two witnesses.

DANIEL H. J ACKMAN.

Witnesses:

SAMUEL N. POND, J ENNIE NORBY.

